RT Journal Article SR Electronic T1 169Yb-DTPA Cisternography: How Many Rads Does the Brain Receive? JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 643 OP 643 VO 15 IS 7 A1 Naomi Alazraki A1 Sheldon Hurwitz A1 Samuel E. Halpern A1 William L. Ashburn YR 1974 UL http://jnm.snmjournals.org/content/15/7/643.abstract AB